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题名: Bioaccumulation and enantioselectivity of type I and type II pyrethroid pesticides in earthworm
作者: Chang, Jing; Wang, Yinghuan; Wang, Huili; Li, Jianzhong; Xu, Peng
刊名: CHEMOSPHERE
出版日期: 2016-02
卷号: 144, 页码:1351-1357
关键词: Pyrethroid pesticides ; Bifenthrin ; Lambda-cyhalothrin ; Bioavailability ; Enantioselectivity ; Eisenia fetida
DOI: 10.1016/j.chemosphere.2015.10.011
部门归属: 中国科学院环境生物技术重点实验室
英文摘要: In this study, the bioavailability and enantioselectivity differences between bifenthrin (BF, typeIpyrethroid) and lambad-cyhalothrin (LCT, type II pyrethroid) in earthworm (Eisenia fetida) were investigated. The bio-soil accumulation factors (BSAFs) of BF was about 4 times greater than that of LCT. LCT was degraded faster than BF in soil while eliminated lower in earthworm samples. Compound sorption plays an important role on bioavailability in earthworm, and the soil-adsorption coefficient (K-oc) of BF and LCT were 22 442 and 42 578, respectively. Metabolic capacity of earthworm to LCT was further studied as no significant difference in the accumulation of LCT between the high and low dose experiment was found. 3-phenoxybenzoic acid (PBCOOH), a metabolite of LCT produced by earthworm was detected in soil. The concentration of PBCOOH at high dose exposure was about 4.7 times greater than that of in low dose level at the fifth day. The bioaccumulation of BF and LCT were both enantioselective in earthworm. The enantiomer factors of BF and LCT in earthworm were approximately 0.12 and 0.65, respectively. The more toxic enantiomers ((+)-BF and (-)-LCT) had a preferential degradation in earthworm and leaded to less toxicity on earthworm for racemate exposure. In combination with other studies, a liner relationship between Log BSAF(s) and Log K-ow was observed, and the Log BSAFs decreased with the increase of Log K-ow. (C) 2015 Elsevier Ltd. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36100
Appears in Collections:中国科学院环境生物技术重点实验室_期刊论文

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